Matlab ode45 help

prieur5

function f=myfun1(t,y)

dy1_dt=-y(2)+exp(-t);

dy2_dt=2*y(1)-3*y(2); f=[dy1_dt;dy2_dt];

[tout,yout]=ode45('myfun1',[0,100],[0,0]);

close all

plot(yout)

Error using myfun1 (line 2) Not enough input arguments.

Thanks for any help/input